/Engine/Plugins/Runtime/XRBase/Source/XRBase/Public/HeadMountedDisplayBase.h
Called just after the late update on the render thread passing back the current relative transform.
virtual void OnLateUpdateApplied_RenderThread ( [FRHICommandListImmediate](API\Runtime\RHI\FRHICommandListImmediate) & RHICmdList, const FTransform & NewRelativeTransform )